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Y <br /> Nitrate Mass Balance Calculation, Parcel 1 <br /> i P <br /> I Data Input: <br /> - ! <br />' Effluent Quantity(Q): 654 gais/day Concentration Rain (Nb): 1.00 mg/L-N <br /> Effluent Stream (NH,): 45.00 mg/L-N Denitrification (d): 10.0% <br /> Site Area(A): 43.28 Acres Deep Pere. of Rain(R): 5.76 in/yr <br /> Waste Loading (W): 0.20 in/yr <br /> 3 Result: <br /> Mass Balance(N,): 2.3 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> Percent of MCL Nitrate as N 23% <br /> r <br /> 11' ITt Equations: <br />' (W) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 Find <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A)acre <br /> 0.2 in/yr(site) =654 ga!/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre 143,560 sq-ft)x(12 in/1 R)x(1 site 143.28 acres) <br /> Nr.= WN (1-der Hantzsche-Fennemore Equation (No), <br /> W+R <br /> 2.35 mg/L-N= ((0.2 in/yr x 45 mg/L-N x(1-0.1))+(5.76 in/yr x 1mg/L-N))/(0.2 in/yr+5.76 in/yr) <br /> Variables: <br /> -� Nc=Average nitrate-N concentration (mg/1) of combined effluent and rainfall percolate (2.35 mg/L-N). <br /> I W= Uniform waste water loading for study area (in/yr) (0.2 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate(45 mg/L-N). <br /> d=Fraction of nitrate-N loss due to-denitrification in the soil (10%). <br /> R= Uniform deep percolation of rainfall (5.76 in/yr). <br /> t + Nb= Background nitrate-N concentration of rainfall (1 mg/L-N). <br /> .4 Assumptions: <br /> ' 1. Total nitrogen concentration of waste stream based on estimate of 45 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 10%. <br /> 3. Estimated deep percolation of rainfall is 5.76 in/yr, see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> { <br /> r � <br /> fl . <br /> { <br /> NEIL O. ANDERSON <br /> AN D ASSOCIATES <br /> i� <br /> Plate 10 <br /> (1 <br /> S <br />